Home / 2,116.40-3,167.40-1,857.20

Finding the Fourth Proportional to 2,116.40, 3,167.40 and 1,857.20

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Solution

The fourth proportional to 2,116.40, 3,167.40 and 1,857.20 is: 2,779.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,116.40 : 3,167.40 = 1,857.20 : x
  2. Step 2: Convert to fraction form
    2,116.40/3,167.40 = 1,857.20/x
  3. Step 3: Cross multiply
    2,116.40x = 3,167.40 × 1,857.20
  4. Step 4: Simplify right side
    2,116.40x = 5,882,495.28
  5. Step 5: Solve for x
    x = 5,882,495.28/2,116.40
  6. Step 6: Final answer
    x = 2,779.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.